Did you know that Aug. 13 is International Left-Handers Day? Chances are that President Barack Obama, to say nothing of quite a few of his predecessors, knows it. Why? Because he — like four of his last six predecessors — is a lefty. (And we’re not talking about politically.)

Obama, Bill Clinton, George H.W. Bush, Ronald Reagan and Gerald Ford are or were left-handed — quite the statistical anomaly, considering that only about 1 in 10 people worldwide prefer using their left hands.

Naturally there is a website to teach you everything you needed to know about Left-Handers Day. It turns out that 1 in 4 Apollo astronauts were left-handed, as were four of the five original designers of the Macintosh computer. When it comes to twins, one of them has a high chance of being left-handed, and lefties are believed to be especially good at the likes of tennis, baseball, swimming and fencing.

There’s also a more serious side to the day, which spreads awareness about the special needs of left-handed kids. Also, lefties are far more likely to develop schizophrenia than right-handers, for reasons not well understood.

But in an election year, the main question seems to be one of politics. Does the trend give Obama-Biden (lefty-righty) an edge over Mitt Romney and his newly chosen vice-presidential candidate, Paul Ryan, who are both right-handed? Maybe Romney or Ryan should start signing things with his left hand, just to even the odds.